stefanflamme2
Arkana Hybrid Overvoltage Faults
Summary of the thread
A 2023 Renault Arkana Hybrid with 185,000 km is experiencing overvoltage faults, causing system failures and electrical issues. The problem may be linked to a weak or defective battery, which can cause the ECU to malfunction and generate overvoltage errors. It is suggested to test the battery and check the charging system, as a failing battery might lead to the charging system overcompensating. Replacing the battery resolved the issues, restoring the car's functionality.
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4 comment(s)
stefanflamme2 (community.author)
Thanks for the quick reply! No, I haven't had the battery tested recently. I just assumed overvoltage meant something was putting too much power into the system, not too little. So a weak battery could actually trigger overvoltage errors?
leonsteel3
Yeah, it's counterintuitive, I know! But a failing battery can cause the ECU to freak out and throw all sorts of weird codes. The charging system might be overcompensating trying to charge a bad battery. I'd definitely get the battery checked, but honestly, with that many electrical issues, it's probably best to get it to a workshop with the right diagnostic tools.
stefanflamme2 (community.author)
Okay, that makes sense. I'll get the battery tested ASAP, but you're right, probably best to have a pro look at it. Thanks for the advice! It turns out it was the battery, just like you said. Got it replaced for 290€ and the car's running perfectly again!
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RENAULT
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ARKANA
leonsteel3
Sounds familiar! I had similar overvoltage problems with my old BMW 3 series, although it was a diesel. Loads of errors popping up and the car acting strangely. It might be worth checking the battery's condition and the charging system. Have you had the battery tested recently?